Nut-lock.



W. H. PITTMAN.

NUT LOCK.

APPLICATION FILED IAYZ, l9ll.

} Patented Feb, 19,1918.

I l illl'am/ZPitm Zt Qqrussas I an M ATTOR N EY WILLIAM H. PITT-MAN, OF MINATABE, NEBRASKA.

Nor-Loom Specification of Letters Patent.

Patented Feb. 19, 1918.

Application filed May 2, 1917. Serial No. 165,958.

To all whom it ma concern:

Be it known tiat I, WiLLiAM'H. Prre MAN, a citizen of the United States, residing at Minatare, in the county of Scotts Bluff and State of Nebraska, have invented certain new and useful Improven'ients in Nut-Looks, of which the following is a :mceificati'on.

This invention relates to nut locks.

One of the main objects of the invention is: to provide a nut lock of simple construction and operation eoi'nposed of .1. .rninimum of parts in which the nuPmed may be of standa d co notion beiiig entirely free of all groove slots. and similar (lWiucommonly used in many forms in not hooks. f. further object is to provide a. nut look comprising broudly a. bolt having at grows extending substantially the full length of the threaded portion of the bolt, a nut threaded on the bolt, and a locking member mounted in this groove and bent about the nut so as to prevent rotation of the same. A still further object is to provide means whereby the locking member may be secured'against rotation and the inner end of this member may also be' so secured as to prevent disengagement of the some with the body or the stem of the bolt so as to eliminate all possibility of this locking member moving outward of the it so as to release the nut. Further objetv will appear from. the detailed deseription.

In the drawings l. is it si oi nut loot. con structed in accordance with my invention, partly in section Fig. 2 is an end view of the nut lock taken from the-threaded end of the bolt.

The bolt A is provided with the usual head 13, and stem or body C, the end portion D of this stem being threaded in the usual manner to receive the hexagonal nut E of standard construction. The stem C of the bolt is provided with 21- longitudinally extending groove 1, this groove extending the full length of the threaded portion D. Groove. 1 is contiguous to a recess 4 provided inthe stem of the bolt and disposed at an angle to the groove. As will be. noted more clearly from. Fig. 1 of the drawings,

the recess 4 is straight and is disposed at a downward and forward inclination to the axis of stem C: of the bolt so as to permit ready insertion or removal of the finger 2 could be done if the finger 4 were not diswhen the looking member 3 is placed in operative position. As iylll be noted :trontz Big. 1 of the drawings, recess 4 is d'lS'[JUSO(l at an acute angle to the groove, being in ahead downward and tmvard the tin-ended portion of the bolt.

The groove 1 is adeptml to receive a lock: ing member 3. This member now he formed from a heavy piece of wirecoz' n. steel rod may be utilized. The inner end of inemliler 3 s bent at on. acute angle to lirovide the J. "l

.(lHQl'l-Kl to [i the fl" 4 when member 3 posit: in to groove 1, thus looking this inc-miner against rotation, as shown.

In using this I limiting i'i'li'tlmlnll .13 first placed in the groove 1 so as to extend imyond the end oi SlPIl'l (I- of the bolt at 76 In this position the body portion of member 3 is positioned Within the periphery of stem C of the bolt so that the projecting portion 3 will fit through the nut E thus permitting the some to be threaded onto the bolt in the usual manner. After the nut has been threaded onto the bolt to the extent desired, the outer projecting portion S of member 3 is bent outward and over about the outer face of the nut E as at 5, and is then bent inward at an angle so as to form a linger 6 which projects downward in front of one of the sir faces 7 of the hexago-' r son t tber witl'i. hen the looking in nher in this manner the l rotary mo e; i .o stem of the bout as will be obv us.

As will be noted from Fig. lot the draw ingsl the finger 2 at the inner end of: locking member 3 engages beneath the angularly disposed shoulder 8 intermediate the groove 1 and recess 4. For this reason outward movement of the inner end of member radially of the stem C of the bolt is positively prevented. This eliminates all possibilit of the inner end of the looking member ecorning accidentally disengaged from recess 2 so as to permit outward movement of the locking member thus permitting rota- 106 tion of the nut. In addition, this shoulder 8 prevents theinner nd of the locking member from being moved out of operative position by any unauthorized person, as

osed at an angle to the body of this mem' er, thus rendering it n'.--:;-.e ssa ry to bend the portion 5 and finger of this member to release the nut. As any bending of this part of the lockin member sufficient to release the nut would be readily noticed by a per son glancing at or inspecting the nut lock, this securing of the inner end of the look ing member against outward movement radially of the stem C of the bolt serves, in this manner, as a safeguard against unauthorized persons tampering with the nut lock. By constructing my nut lock in this manner a bolt and nut of standard construction may be used, the only requirement be ing'that the bolt be provided with a suitable groove and a recess. The locking member may be formed from heavy Wire or steel rods cut into suitable length and may, for this reason, he produced at very sma-lljeost. This nut lock 1s composed of a minimum of parts, all of these parts, with the exception of the locking member being of standard construction and may, therefore, be quickly and cheaply made.

\Vhat I claim is In nut looks, a bolt provided with a longitudinally extending groove in the threaded portion of its stern and a straight recess contiguous to the inner end of: said groove, said recess bein disposed at a forward and downward inclination to the axis of the stem of said bolt, a nut threaded on the bolt, and a locking member mounted in said groove provided at its inner end with an angularly disposed fingerengaging into said recess, said lockin member extending through the nut an being bent over and about the same so as to engage one of the lateral faces of the nut and prevent rotation thereof relative to said bolt.

In testimony whereof I afiix my signature in presence of two witnesses.

WILLIAM H. PITTMAN.

Witnesses:

R. J. HAnsHMAn', R. G. MAYNARD. 

